First:
You need a good seat harness this is key. When things get really pumping the waist harness allows you to maintain a lower center of gravity. The waist harness when really powered with a big kite will get pulled up and raise your center of gravity thus you just get pulled of the board by the power. The waist will stay lower allowing you to really lay back and use your full weight potential to hold the power until needed.

looks like you are confused with seat and waist harness here..have a look and correct where needed

First:
You need a good seat harness this is key. When things get really pumping the waist harness allows you to maintain a lower center of gravity. The waist harness when really powered with a big kite will get pulled up and raise your center of gravity thus you just get pulled of the board by the power. The waist will stay lower allowing you to really lay back and use your full weight potential to hold the power until needed.

looks like you are confused with seat and waist harness here..have a look and correct where needed

Simplisity with style. How do you hold a board by its tip in 35 knot winds?

I also like the upside down action. Is that called a Deadman?

he is gripping it by the fin, it's not hard to hold it from there actually it is the easiest board off you can do, because from the tail you can pull out your legs one at a time, and then put them back in one at time too while with the center handle you need to coordinate both legs in and out of the straps at the same time.